java.lang.IllegalStateException: Not building!
at TRANSFORMER/[email protected]/dev.tr7zw.skinlayers.render.CustomizableModelPart.compile(CustomizableModelPart.java:183)
at TRANSFORMER/[email protected]/dev.tr7zw.skinlayers.render.CustomizableModelPart.render(CustomizableModelPart.java:109)
at TRANSFORMER/[email protected]/traben.entity_model_features.models.parts.EMFModelPart.handler$fna001$skinlayers3d$render(EMFModelPart.java:528)
at TRANSFORMER/[email protected]/de.teamlapen.vampirism.client.renderer.RenderHandler.onRenderLivingPost(RenderHandler.java:225)

crash-2025-08-12_22.58.32-client.txt

Looks like something with EMF, try to reproduce without that/check for updates.